Question

用java双层嵌套循环画三角形。 急！！！

代码附件发到1934243853@qq.com

Answer 1

package com.buddy.hr.test;

public class PriveTest {

/**
* @param args
*/
public static void main(String[] args) {
PriveTest pt = new PriveTest();
pt.Test3();
}

// 直角三角形
public void Test1() {
for (int i = 0; i < 4; i++) {
for (int k = 0; k <= i; k++) {
System.out.print("1");
}
for (int j = 4; j > i; j--) {
System.out.print("*");
}
System.out.println("");
}
}

// 直角三角形2
public void Test2() {
for (int i = 0; i < 4; i++) {
// for(int k=0;k<=i;k++){
// System.out.print(" ");
// }
for (int j = 4; j > i; j--) {
System.out.print("*");
}
System.out.println("");
}
}

// 等腰三角形
public void Test3() {
for (int i = 0; i < 4; i++) {
for (int k = 0; k < i; k++) {
System.out.print("1");
}
for (int j = 4; j > i; j--) {
System.out.print("*");
}
for (int j = 3; j > i; j--) {
System.out.print("*");
}
System.out.println("2");
}
}
}

Answer 2

public Test{
public void sjx(){
int lo = 6;
for(int i=1;i<=lo;i++){
//打空格�1->3 2->2 3->1 4->0
for(int k=1;k<=lo-i;k++){
System.out.print(" ");
}
//1->1 2->3 3->5 4->7 (i-1)*2 + 1
for(int j=1;j<=(i-1)*2+1;j++){
System.out.print("*");
}
System.out.println();
}
}
public static void main(String args[]){
new Test().sjx();
}
}

Answer 3

public void Test1() {
for (int i = 0; i < 4; i++) {
for (int k = 0; k <= i; k++) {
System.out.print("1");
}
for (int j = 4; j > i; j--) {
System.out.print("*");
}
System.out.println("");
}
}